Filter.



No. 677,893.. Patentedluly 9, |901. J. A. MAIGNEN.

FILTER.

(Application led Apr. 26, 189B.)

(No Model.)

UNITED STATES JEAN AUGUSTE MAIGNEN, OF PHILADELPHIA, PENNSYLVANIA.

FILTER.

SPECIFICATION forming part of Letters Patent No. 677,893, dated July 9, 1901.

Application filed April 26, 1898. Serial No. 678,851. (No model.)

To @ZZ wt'om, it may concern.-

Beit known that I, JEAN' AUGUSTE Mare- NEN, of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Filters, whereof the following is a specification, reference being had to the accompanying drawings.

My invention relates to filters ot hollow.

ering of fibrous or powdered filtering media,

such as asbestos-pulp or powdered charcoal or analogous material.

.In the accompanying drawings, Figure lis a` central vertical section through a convenient embodiment of my invention. Fig. 2 is a sectional view of a modified form of my invention.

In Fig. l the filter core or body A consists of an integrally-constructed hollow shell, and the filtrate-outlet pipe B is extended through said shell and secured in proper relation therewith by the nuts b and washers b. Said pipe B communicates with the interior of the body A by perforations b2. The shell A is covered with asbestos cloth or analogous material, as indicated at C, and upon the exterior of said covering C isa second covering D, of fine filtering media, brous or powdered. The iiltcris supported upon the pipe B within the tank E, which contains the water F, and the latter in process of filtration passes from said tank to the interior of the filter-body A and out through the pipe B.

The body A may be composed of any material having a filtering capacity-such as porous porcelain, natural o'r artificial porous stone, porous stoneware, or other porous ceramic, porous plastic charcoal, or the like. For comparatively small filters the body A may be conveniently formed in a single shell,'

as indicated in Fig. l. Itis obvious, however, that the interior of a body thus formed is not conveniently accessible, and it is therefore preferable for some purposes to form said body of separable slabs or sections.

As shown in Fig. 2, the bodyA is composed of slabs ct a., provided with the coverings C and D. In this form of my invention the several parts of the body A are assembled in normally fixed relation Within suitable frames A', connected by bolts ct and nuts a?.

Itis to be understood that in both of the forms of my invention which I have illustrated the water to be filtered passes, first, through the covering; D,second,tl1rough the covering C, and, third, through the side walls of the body A to the interior thereof, the filtrate beingdischargedin anyconvenientmannerfrom the interior of said body A.

I do not desire to limit myself to the particular details of construction which I have illustrated, as it is obvious that various modifications may be made therein Without departing from the spirit 0f my invention. Moreover, it is to be understood that I have used `the term Water, herein in adescriptive and not in a restrictive sense, as it is obvious that the precise nature of the liquid filtered is not of the essence of my invention.

I claim- A filter comprising a body composed of materialhaving a filtering capacity; a covering for said body of asbestos cloth or analogous material; a filtrate outlet communicating with said filtering-body, and an outer covering of fibrous or powdered filtering media,substantially as set forth.

JEAN AUGUSTE MAIGNEN. lVitnesses:

WM. C. WIEDERSHEIM, E. HAYWARD FAIRBANKS. 

